<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>yundong</title>
</head>
<style>
	#div1 {width: 200px;height:200px ;background: red;position:absolute ;left: 0;top: 50px;

	}

</style>
<script>
	setInterval(function () {
		var oDiv=document.getElementById("div1");
		oDiv.style.left=oDiv.offsetLeft+10+"px";


	},30)
</script>
<body>
<div id="div1">

</div>
</body>
</html>